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Wang Y, Nie B, Zheng S, Wu H, Chen N, Wang D. Emerging activated tungsten dust: Source, environmental behaviors, and health effects. ENVIRONMENT INTERNATIONAL 2024; 188:108774. [PMID: 38810497 DOI: 10.1016/j.envint.2024.108774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2024] [Revised: 05/18/2024] [Accepted: 05/23/2024] [Indexed: 05/31/2024]
Abstract
Fusion energy investigation has stepped to a new stage adopting deuterium and tritium as fuels from the previous stage concentrating hydrogen plasma physics. Special radiation safety issues would be introduced during this stage. In addition to industrial and military uses, tungsten is also regarded as the most promising plasma facing material for fusion reactors. During the operation of fusion reactors, tungsten-based plasma facing materials can be activated via neutron nuclear reaction. Meanwhile, activated tungsten dust can be produced when high-energy plasma interacts with the tungsten-based plasma facing materials, namely plasma wall interaction. Activated tungsten dust would be an emerging environmental pollutant with radiation toxicity containing various radionuclides in addition to the chemical toxicity of tungsten itself. Nonetheless, the historical underestimation of its environmental availability has led to limited research on tungsten compared to other environmental contaminants. This paper presents the first systematic review on the safety issue of emerging activated tungsten dust, encompassing source terms, environmental behaviors, and health effects. The key contents are as follows: 1) to detail the source terms of activated tungsten dust from aspects of tungsten basic properties, generation mechanism, physical morphology and chemical component, radioactivity, as well as potential release pathways, 2) to illustrate the environmental behaviors from aspects of atmospheric dispersion and deposition, transformation and migration in soil, as well as plant absorption and distribution, 3) to identify the toxicity and health effects from aspects of toxicity to plants, distribution in human body, as well as health effects by radiation and chemical toxicity, 4) based on the research progress, research and development issues needed are also pointed out to better knowledge of safety issue of activated tungsten dust, which would be beneficial to the area of fusion energy and ecological impact caused by the routine tungsten related industrial and military applications.
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Affiliation(s)
- Yuxuan Wang
- School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Baojie Nie
- School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
| | - Shanliang Zheng
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, China
| | - Hanyu Wu
- Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, China
| | - Ni Chen
- School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China
| | - Dezhong Wang
- School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
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Chen C, Yu Y, Tian T, Xu B, Wu H, Wang G, Chen Y. Arsenic (As) accumulation in different genotypes of indica rice (Oryza sativa L.) and health risk assessment based on inorganic As. ENVIRONMENTAL MONITORING AND ASSESSMENT 2024; 196:310. [PMID: 38407801 DOI: 10.1007/s10661-024-12470-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Accepted: 02/17/2024] [Indexed: 02/27/2024]
Abstract
To reveal differences in arsenic (As) accumulation among indica rice cultivars and assess the human health risks arising from inorganic arsenic (iAs) intake via rice consumption, a total of 320 field indica rice samples and corresponding soil samples were collected from Fujian Province in China. The results showed that available soil As (0.03 to 3.83 mg/kg) showed a statistically significant positive correlation with total soil As (0.10 to 19.45 mg/kg). The inorganic As content in brown rice was between 0.001 and 0.316 mg/kg. Among the cultivars, ten brown rice samples (3.13%) exceeded the maximum contaminant level (MCL) of iAs in food of 0.2 mg/kg in China. The estimated daily intake (EDI) and calculated individual incremental lifetime cancer risk (ILCR) ranged from 0.337 µg/day to 106.60 µg/day and from 8.18 × 10-6 to 2.59 × 10-3, respectively. Surprisingly, the average EDI and the EDIs of 258 (80.63%) brown rice samples were higher than the maximum daily intake (MDI) of 10 µg/day in drinking water as set by the National Research Council. The mean ILCR associated with iAs was 54.3 per 100,000, which exceeds the acceptable upper limit (AUL) of 10 per 100,000 set by the USEPA. Notably, the cultivars Y-Liang-You 1 and Shi-Ji 137 exhibited significantly higher mean ILCRs compared to the AUL and other cultivars, indicating that they pose more serious cancer risks to the local population. Finally, this study demonstrated that the cultivars Yi-Xiang 2292 and Quan-Zhen 10 were the optimal cultivars to mitigate risks associated with iAs to human health from rice consumption.
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Affiliation(s)
- Chunle Chen
- School of Resources and Chemical Engineering, Sanming University, Sanming, 365004, Fujian, China
- College of Resources and Environment, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, Cangshan District, Fuzhou, Fujian, 350002, People's Republic of China
| | - Yanhang Yu
- School of Resources and Chemical Engineering, Sanming University, Sanming, 365004, Fujian, China
| | - Tian Tian
- School of Resources and Chemical Engineering, Sanming University, Sanming, 365004, Fujian, China
- College of Resources and Environment, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, Cangshan District, Fuzhou, Fujian, 350002, People's Republic of China
| | - Bo Xu
- College of Resources and Environment, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, Cangshan District, Fuzhou, Fujian, 350002, People's Republic of China
| | - Hongyan Wu
- School of Resources and Chemical Engineering, Sanming University, Sanming, 365004, Fujian, China
| | - Guo Wang
- College of Resources and Environment, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, Cangshan District, Fuzhou, Fujian, 350002, People's Republic of China
| | - Yanhui Chen
- College of Resources and Environment, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, Cangshan District, Fuzhou, Fujian, 350002, People's Republic of China.
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Abstract
The increasing use of tungsten in the production of green energy in the aerospace and military industries, and in many other hi-tech applications, may increase the content of this element in soil. This overview examines some aspects of the behavior of tungsten in soil, such as the importance of characteristics of soils in relation to bioavailability processes, the chemical approaches to evaluate tungsten mobility in the soil environment and the importance of adsorption and desorption processes. Tungsten behavior depends on soil properties of which the most important is soil pH, which determines the solubility and polymerization of tungstate ions and the characteristics of the adsorbing soil surfaces. During the adsorption and desorption of tungsten, iron, and aluminum oxides, and hydroxides play a key role as they are the most important adsorbing surfaces for tungsten. The behavior of tungsten compounds in the soil determines the transfer of this element in plants and therefore in the food chain. Despite the growing importance of tungsten in everyday life, environmental regulations concerning soil do not take this element into consideration. The purpose of this review is also to provide some basic information that could be useful when considering tungsten in environmental legislation.
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Li R, Wang L, Yin L. Materials and Devices for Biodegradable and Soft Biomedical Electronics. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E2108. [PMID: 30373154 PMCID: PMC6267565 DOI: 10.3390/ma11112108] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 10/22/2018] [Accepted: 10/23/2018] [Indexed: 11/16/2022]
Abstract
Biodegradable and soft biomedical electronics that eliminate secondary surgery and ensure intimate contact with soft biological tissues of the human body are of growing interest, due to their emerging applications in high-quality healthcare monitoring and effective disease treatments. Recent systematic studies have significantly expanded the biodegradable electronic materials database, and various novel transient systems have been proposed. Biodegradable materials with soft properties and integration schemes of flexible or/and stretchable platforms will further advance electronic systems that match the properties of biological systems, providing an important step along the path towards clinical trials. This review focuses on recent progress and achievements in biodegradable and soft electronics for biomedical applications. The available biodegradable materials in their soft formats, the associated novel fabrication schemes, the device layouts, and the functionality of a variety of fully bioresorbable and soft devices, are reviewed. Finally, the key challenges and possible future directions of biodegradable and soft electronics are provided.
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Affiliation(s)
- Rongfeng Li
- School of Materials Science and Engineering, The Key Laboratory of Advanced Materials of Ministry of Education, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China.
| | - Liu Wang
- School of Materials Science and Engineering, The Key Laboratory of Advanced Materials of Ministry of Education, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China.
| | - Lan Yin
- School of Materials Science and Engineering, The Key Laboratory of Advanced Materials of Ministry of Education, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China.
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